History Characters / TeenageMutantNinjaTurtles

* AvengingTheVillain: Not any villain ''we're'' familiar with, mind you, but Hamato Yoshi's enemy, Oroko Nagi, Shredder's brother. After Nagi tried to kill Tang Shen, a woman who had chosen Yoshi over him, Yoshi killed him. Shredder would spend the next ten years obsessively training and rising in the ranks of the Foot for the sole purpose of pursuing Yoshi to America to finally kill him.

* GoodScarsEvilScars: Almost every incarnation has a mark, usually caused by Splinter.

* FlawedPrototype: [[spoiler:The "real" Shredder (actually another, more successful clone) reveals that the three of them were initial, somewhat faile attempts to resurrect the Shredder in the form of [[TheWormThatWalks worm colony clones]] in the original Mirage comics]].

* TheWormThatWalks: [[spoiler:In the original Mirage comics, the three of them, and the resurrected Shredder are actually a colony of mystical worms that tried to unsuccessfully take on the Shredder's form and personality.]]

* UnholyMatrimony: He has a wife named Savanti Juliet. Though they never officially show up in the same story, from Juliet's descriptions they appear to have had a stable and loving relationahip.

* FourTemperamentEnsemble: The rational leader Leonardo is Melancholic, the calm gadgeteer Donatello is Phlegmatic, the goofball Michelangelo is Sanguine, and the short-tempered Raphael is Choleric.

* SensitiveGuyAndManlyMan: Donatello and Michaelangelo are less aggressive and kinder than Leonardo and Raphael.

* BattleStrip: Removes his armour prior to his duel with Leonardo in the Mirage comics' "Return to New York" arc.

* FragileSpeedster: Owing to his size, Shrimp is incredibly fast, but not as strong as the others.

* EvilLaugh: The 1987 version, at least, is prone to pealing out malevolent cackles when things seem to be going his way.

* EvilSoundsDeep: Frequently sounds like this in adaptations, with his voices in the movies and the 2003 series being the deepest. Initially, in the 2003 series, he only sounded this way when he was wearing the helmet, as it gave his voice a metallic tinge, but as the series progressed, his natural voice started sounding as deep as his artificial voice. [[spoiler:The original Oroku Saki/the Tengu Shredder also has an epic deep, demonic voice, courtesy of Scottie Ray.]

* EvilSoundsDeep: Frequently sounds like this in adaptations, with his voices in the movies and the 2012 series being the deepest. In the 2003 series, he only sounded this way when he was wearing the helmet, as it gave his voice a metallic tinge.

* BigLittleBrother: Commonly shown to be the tallest of the four turtles; even in the original comics, where they're all identical in appearance. This is most notable in the 2012 series, the 2014 movie/its sequel, and even in the Batman crossover film.

* AloofBigBrother: Partially inverted. He's younger than Leonardo making him an aloof little brother, but older than Donatello and Michelangelo, playing it straight for them.

* BigBrotherInstinct: Most significantly to Michelangelo, especially in the comics. Somewhat in the 2003 and 2012 series. Also applies to Donatello sometimes, and though it's not explicitly stated, Raphael is generally taken to be the second oldest. However, this is averted and played straight in the 2018 series. Raph is explicitly stated to be the oldest meaning he also shows this to Leo.

%%* {{Advertised Extra}}s: In ''WesternAnimation/TurtlesForever''.

%%* EvilKnockoff: Tokka.

->'''Appears in:''' 1987 series, Archie comics, IDW comics, 2012 series.

* HeelFaceTurn: He starts out working with the Shredder in the Archie comics, but realizes he's been duped. After seemingly being DrivenToSuicide, it soon turns out he survived and he goes on to become an ally and later a member of the Mutinimals.

%%* HeroicBSOD: Mirage Comics, 2003 Series.

* MaskPower: When going into action, Casey usually wears an old-style hockey mask. In the Mirage comics, 1987 cartoon, 1990, 2007 and 2016 movies, the 2003 series and the fourth and fifth seasons of the 2012 series, it has an almost skull-like shape. In the 1993 film and 2012 cartoon, it has a more oval shape, similar to that of [[Franchise/FridayThe13th Jason Voorhees]] fame.

* MaskPower: When going into action, Casey usually wears an old-style hockey mask. In the Mirage comics, 1987 cartoon, 1990 and 2007 movies, the 2003 series and the fourth and fifth seasons of the 2012 series, it has an almost skull-like shape. In the 1993 film and 2012 cartoon, it has a more oval shape, similar to that of [[Franchise/FridayThe13th Jason Voorhees]] fame.

* YoungerAndHipper: Just like with April, Renet, and Karai, the IDW comic book and 2012 series' had re-imagined Casey as a teenager within the Turtles' age-group (rather than being older than them like in the other continuities).

* MaskPower: When going into action, Casey usually wears an old-style hockey mask. In the Mirage Comics, 1987 cartoon, 1990 and 2007 movie and the 2003 series, it has an almost skull-like shape. In the 2012 cartoon, it has a more oval shape, similar to that of [[Franchise/FridayThe13th Jason Vorhees]] fame.

* BestFriend: Raphael. Their hot-blooded personalities at first clash with each-other, but soon become best friends after a brawl with the Purple Dragons...and each other.

* TookALevelInDumbass: In the 2012 series. For example, he nearly got himself killed after eating one of Donnie's experiments that was clearly and ''repeatedly'' labeled "Mikey, don't eat".
* TookALevelInJerkass: In the ''Next Mutation'' series. To a lesser extent, in the 2003 series as well.

A race of aliens that resemble anthropomorphic triceratops.

* EvilVsEvil: Most of the times, whenever they make an appearence, they are usually in a war against another evil alien race, be [[ComicBook/TeenageMutantNinjaTurtlesMirage it]] the [[WesternAnimation/TeenageMutantNinjaTurtles2003 Federation]], [[WesternAnimation/TeenageMutantNinjaTurtles2012 the Kraang]] and so on.

* MonsterOfTheWeek: The 1987 cartoon only featured them asone of the series' many one-shot baddies, with the empire invading in a single eisode and being unceremoniously driven off at its end.
* NinjaPirateZombieRobot: They are humanoid alien tricerapots.

* UndergroundMonkey: In the Mirage Comics, they are actually one of several subspecies of a singular race of aliens that resembles humanoid ceratopsians. There are at least two other species in the same family; the hornless Protoceratons (based on Protoceratops) and the many-horned Styracodons (based on Styracosaurus), who showed up in Mirage's volume 4 stories. There is no love lost between the raes, however; the Triceratons have been at war with the Styracodon Imperium and its Protoceraton allies even longer than it has been warring with the Federation. Ironically, Mikey had a brief fling with a Protoceraton princess named Seri.

* AlienInvasion: At least one of their appearences in each incarnation ([[AdaptationalHeroism except IDW comic, where they came in peace]]) will be them invading Earth, be it for its resources, a tactical advantage, terminating their enemy and so on.

* DropTheHammer: In the Mirage comics, Casey carried, as a weapon of last resort, a sledgehammer (along with regular croquet mallets). He also uses one rather effectively in ''ComicBook/TeenageMutantNinjaTurtlesTheLastRonin'' against some [[SuperToughness super tough Foot robots]] [[spoiler:during his and Leo's LastStand]] after his hockey stick and cricket bat have no effect on them.

* GenderBlenderName: Saki is a name common for woman in Japan, which is why it got changed in a certain anime adaptation.

For tropes specific to [[spoiler: his role as the last ronin click [[Characters/TeenageMutantNinjaTurtlesTheLastRonin here]]]]

** Averted in the 2018 series in which Leo is the second oldest.

* BestFriend: Donatello. Because Raph is constantly challenging Leo and Mike constantly has his head in the clouds, the resident genius is the closest to the leader in blue due to his higher maturity level, loyalty, and friendly personality.

** His attitude towards his Bo staff also varies from one iteration to another. In the 2003 series, he is quite proud of the bo staff, often boasting how it is better than his brothers' weapons. In the 2012 series, he thinks it is not very good when fighting advanced alien technology while in ''Mutant Mayhem'', he is completely dismissive of his "big stick" during their first big battle against the thugs who stole April's scooter.

** Out of his brothers, Mikey. Their wild personalities complete each other, both being foils to Leo and Don respectively. Raph even states this in his Micro issue from the original comic series.

* BookDumb: Having had the same training as his brothers, he is by no means stupid when it comes to planning missions or getting out of tricky situations, but he is decidedly lacking in academic prowess. This is more evident in the animated adaptations.

* ColorCodedEyes: The only one to retain green eyes from the 2003 series to the 2012 series, as the color is associated with HotBlooded people. The rest of his (comparably calmer) family have either blue or brown eyes.

For tropes specific to [[spoiler: his role as the last ronin click {{Characters/TeenageMutantNinjaTurtlesTheLastRonin here}}]]

* {{Exp|y}}ies: Of Bebop and Rocksteady. In fact, they were created specifically for the second live-action movie because [[WordOfGod Eastman and Laird did not want Bebop and Rocksteady in it]].

* PutOnABus: Both the 1987 cartoon and the Archie comics ultimately write Bebop & Rocksteady out of the story. In the 87 cartoon, they are abandoned by the Shredder with no explanation given, vanishing during the "Red Sky Seasons". In the Archie comics, their human identities and love of crime are eroded by their animal instincts, so they steal a ship and fly away to live like animals on an uninhabitated "Eden-like" world.

* {{Expy}}: He's based on Stick, the man who trained ComicBook/{{Daredevil}}, complete with [[ShoutOutThemeNaming a name that's a play on his]]. He has a different relationship with his students, however.

* DependingOnTheArtist: Outside of the Mirage comics, the color of his mask is blue, but the shade of blue will depend on the incarnation. In the [[WesternAnimation/TeenageMutantNinjaTurtles1987 1987 animated series]], [[Film/TeenageMutantNinjaTurtles1990 the first]] two [[Film/TeenageMutantNinjaTurtlesIITheSecretOfTheOoze live-action films]] and [[WesternAnimation/TeenageMutantNinjaTurtles2003 the 2003 animated series]] it is a lighter shade of blue. In [[Film/TeenageMutantNinjaTurtlesIII the third live action film]], [[Series/NinjaTurtlesTheNextMutation the live-action TV series]], [[WesternAnimation/{{TMNT}} the 2007]] and [[WesternAnimation/TeenageMutantNinjaTurtlesMutantMayhem 2023 CGI movies]], [[WesternAnimation/TeenageMutantNinjaTurtles2012 the 2012]] and [[WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles the 2018 shows]] and [[Film/TeenageMutantNinjaTurtles2014 the Michael Bay]] produced [[Film/TeenageMutantNinjaTurtlesOutOfTheShadows movies]], it is a darker shade of blue.

->'''Voiced by:''' TBA.

->'''Voiced by:''' TBA.

->'''Voiced by:''' TBA.

->'''Voiced by:''' TBA.